GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 426598  Size: SH
  1. Remove the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.
  2. Remove the rear seat sound barrier. Refer to Rear Seat Back Sound Barrier Replacement in Interior Trim.
  3. Disconnect the electrical connectors from the low frequency audio amplifier.
  4. Loosen the nuts on the low frequency audio amplifier.
  5. Slide the low frequency audio amplifier foward and down.
  6. Remove the low frequency audio amplifier from the vehicle.

Installation Procedure


    Object Number: 426598  Size: SH
  1. Install the tabs of the low frequency audio amplifier into the slots on the rear window panel.
  2. Align the studs to the rear window panel and slide rearward.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Tighten the nuts on the low frequency audio amplifier audio amplifier.
  5. Tighten
    Tighten the nuts on the low frequency audio amplifier to 6N·m  (53 lb in).

  6. Connect the electrical connectors to the low frequency audio amplifier.
  7. Install the rear seat sound barrier. Refer to Rear Seat Back Sound Barrier Replacement in Interior Trim.
  8. Install the rear shelf trim panel. Refer to Rear Window Shelf Trim Panel Replacement in Interior Trim.